Home / 128,855.20-193,023.60-89,456.80

Finding the Fourth Proportional to 128,855.20, 193,023.60 and 89,456.80

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Solution

The fourth proportional to 128,855.20, 193,023.60 and 89,456.80 is: 134,005.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,855.20 : 193,023.60 = 89,456.80 : x
  2. Step 2: Convert to fraction form
    128,855.20/193,023.60 = 89,456.80/x
  3. Step 3: Cross multiply
    128,855.20x = 193,023.60 × 89,456.80
  4. Step 4: Simplify right side
    128,855.20x = 17,267,273,580.48
  5. Step 5: Solve for x
    x = 17,267,273,580.48/128,855.20
  6. Step 6: Final answer
    x = 134,005.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.